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> if you yourself fell into one you wouldn't notice anything specific when you crossed the boundary.

Wouldn't you notice that fairly suddenly everything's getting brighter because all the light/radiation is sucked back in?




I learned recently on [a video](https://youtu.be/a4vHwY0wMjs?t=246) that for very large black holes , we suspect there is no difference.

For smaller BH, the gravity gradient is higher and it would be detectable.




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